Carbureter.



WHITNEY ECKERT, ()F STAMFORD, CONNECTICUT.

CABBUBETER.

Specification 01 Letters Patent.

Patented Feb. 23, 1909.

Application filed April 17, 1908. Serial No. 127,683,

To all whom it may concern:

Be it, known that I, W HITNEY Eolunrr, a citizen of the United States residing at Stamford, in the county of hairfield and btate of Connecticut, have invented certain new and useful Im rovements in Carburetors, of which the ollowing is a specification, reference bein had to the drawing accompanying and orming a part of the same.

My invention is an improvement in apparatus for producing explosive mixtures of hydrocarbon and air, and more particularly on those forms of carburetor shown and described in an application filed by Charles Fox, February th, 1906, Serial No. 301,985, and in an aaplication of even date herewith filed by lendenin Eckert, administrator of the estate of the said 20 Charles Fox, deceased.

The primary objects of my improvements are to dispense entirely with the needle valves heretofore regarded as necessary in devices of this character, to do away with all springs both in and about the carburetor for actuating the valves, to provide for a more efiicient and simple control and regulation of the device, and to simplify and cheapen its construction.

These objects are secured by the carbureter constructed and arranged as shown in the accompanying drawings, inl-which- Figure 1 is a central vertical section of my improved device. Fig. 2 is a View 5 partly 1n elevation and partly in section, 0

a gpgtion of the main controlling valve.

e numeral 1 indicates the mixing chamber of a carbureter which or ma be of the usual kind, but preferably cyhndrical in form. Surrounding this mixing chamher is an outer casing 2, preferably of similar form, large enough in diameter and height to leave an air space or chamber around and above the mixing chamber 'as shown at 3, 4, for the passa e of air admitted through a pipe 5. topof the mixing chamber 1 is formed by a late 6;, having acentral aperture surrounded byan upwardly extending tubular neck 7, in

80 which is fitted a cylindrical valve member 8, capable of a reciprocating movement in said neck. At the up or end of saidvalve men ber 18 an outwar ly extending or norms-4,.

i flango,9, adapted to seat, when the valve member 15 in its lowermost position, on the upper edge of the neck 7, and also on a shoulder or flange 10 on the surrounding wall of the upper portion of the casin 2.

,It will be seen that when the valve mem er 8 is in its'normal position the flange 9 spans and covers the annular port formed between the neck 7 and the shoulder 10, and therefore closes the annular passage through which air is drawn into the mixing chamber through the .ipe 5. The top of the outer casing 2 is chrscd by a casting 11, secured by screws 12 to a flange 13, and through the center of said casting a hole is bored to contain the hydrocarbon supply vhlvehereinafter described.

Across the upper end of the cylindrical valve member 8, extends a soider or series of radial arms, the central hub 14 of which is elongated both above and below the spider. The up oer end of said hub enters the hole bored t rough the castinglland is formed or constructed to constitute a valve for controlling the admission of .hydrocarbon or other liquid to the mixing chamber, by being rovided with a circumferential ove 15, rom which two or more ducts 16 ead to a passage 17, drilled or otherwise formed through the hub 14 and opening into the mixing chamber.

One or more passages 18 to conduct the liquid from a suitable source of su ply to the valve thus constituted are forme transversely through the casting 11, the orifices of the said passages being so placed as to be alternately opened and closed by the reciprocation of the hub or stem '14:. The lower end of the hub 14 terminates in a nipple 19 having a central opening 20 and a series of passages 21 rnnnin v obh the upper edge of the nipp e to t e central bore 17.

The play of the valves 8 and 14 is regulated by a nut 22 threaded to fit the upper threaded portion of the bore of the casin 11 and turned by the enga ement therewit of a uared key 23, carrie by a worm nut 24, turned at will by a worm screw 25. In the top of the valve 14 is a recess 26 to receive the lower end of the key 23, when the hWcr by its adjustment is caused to protrude through the nut 22.

When thus constructed the o eration of the device is as follows: Let it e assumed that the carbureter is used in connection with'an internal combustion engine or the like; that the air which entersat 5 is drawn through the mixing chamber and into the engine by the suction produced by the movement of the engine pistons, and that the air before entering the device is heated, either by the exhaust from the engine or otherwise. When the engine, having been started in the usual way, is running normally, a par tial vacuum is created ata given instant within the mixing chamber 1 and the space above the valve 8 by the movement of a piston. The pressure of air in the annular chamber 3, therefore, lifts the valve 8 against the force of gravity and raises its flange from its seat. The liftin of the valve 8, raises the hub or valve 14, ringing the groove 15 therein into register with the port or orifice of the passage 18 for hydrocarbon and this establishes direct communication between the su ply of hydrocarbon and the mixing cham er through the bore of valve 14. The hydrocarbon or other liquid is thereu on drawn b suction down through the sai bore to the ischarge orifice of the same. The upward movement of the valve 8 also carries a series of perforations 27, formed inthe cylindrical body of said valve immediatel beneath the flange 9, above the edge 0 the neck 7, and through the parts thus opened a charge of air is admitted which conver es centrally downward with a tendency to develop a vortex about and u on the nipple at the lower extremity of va ve 14. At the same time, the major part of the charge of air admitted to the mixing chamber to en ply the partial vacuum by which the va ve 8 is raised onters through the annular port 0 ened by the flange 9 and being deflected b t e arched or curved upper surface of t e chamber is caused to take the same course downward through the valve 8 and aroundhe central hub 12 and the nipple at the end thereof. A part of the two commingled currerlts of air thus established asses throu h the passages in the iii ple an taking u t e hydrocarbon issuing f om the lower en of the passage 17 atomizes and discharges it through the orifice 20 into the mixing chamber 1. It will be understood, althou h the interior arran ement of the chem er is not illustrated in etail, that bailie plates such as are shown and described in the a plications hereinbefore referred to should e used in such chamber.

By means of this greatly simplified construction I secure an extreme delicacy of control of the operation of the carbureter and provide for a positive locking of such control at any stage. I have furthermore ,found that with the construction shown shocks to any working part of the controllingdevices by hammering of the valve stem at' gh speed, the creation of a vacuum, accumulation of oil or back ressure of any kind above the valve are entirely avoided.

Having now described my invention what I claim is:

- 1. In a carbureter, the combination with a i mixing chamber having an air inlet formed through an upwardly extending neck, an

outer casing providing a port around said,

neck, a cylindrical valve member working in said neck and having a flange covering the said port,;a hub or stem carried by the said valve member and having a passage through itself connecting a groove in its side with the interior of the mixing chamber and an 'oil supply communicating with the chamber in which said hub Works, whereby said oil supply will be brou ht into direct communication with the mixing chamber by the reciprocation of the air valve, as set forth.

2. In a carbureter as herein described, the combination with the valve 8 controlling ports for the admission of air, of an oil sup ly controlled b the hub or stem 14 carrie by the air va ve, and a nipple at the lower extremity of said hub, provided with perforations to direct the air admitted throu h the ports toward the orifice of a centra passage in the hub from which the oil is discharged into the mixing chamber.

3. The combination of the cylindrical valve member 8, having a flange 9 covering the port for the admission of air, and the row of perforations 27, opened by the lifting of said valve member, the central hub or stem l4, workin in a chamber above the air valve and constituting a valve for controlling the admission of hydrocarbon to the mixing chamber, and the nipple provided with converging air passages at the lower extremity of the said'valve 14, as set forth.

tending neck, an outer casing containing an annular port around the neck and having its walls rounded to deflect the enteringcharges of air centrally downwards through the neck, a cylindrical valve member working in said neck and having a flange covering the an nular port, an oll supply valve operated by the movements of the cylindrical air valve and having a hollow stem pro'ecting centrally into the said air valve an adapted to discharge the oil through the orifice at its lower end into the converging current of air, whereby the discharged Oll will be atomized, as set forth. a

5. The combined air and oil control valve for carbureters, as herein described, composed of a hollow cylindrical member 8, a

flange 9, a hub or stem 14, supported by charges oioii issuing from the ducL my be radial arms on the cylindrical member, the atomized, as set forth.

said stem c'ontaining a longitudinal duchfor T 1 conveying charges of oil from an oil sup 1 WHITE bblxImT chamber and a nipple at its lower end wit Witnesses:

air passages therein converging to the dis S. S. DUNHAM,

"charge orifice of the duct, whereby the M. LAWSON DYER. 

